Brush



May 29, 1934. Q FROST 1,960,487.

BRUSH Filed 001'.- 14, 1930 2 EM 6) 6i 3 wwwww [FE A;

INVENTOR.

Patented May 29, 1934 UNITED STATES BRUSH Clinton E. Frost, ClevelandHeights, Ohio, as-

signor to The Osborn Manufacturing Company, Cleveland, Ohio, acorporation of Ohio Application October 14,

4 Claims.

This invention relates to an improved brush of the type usually known inthe art as sectional brushes, in which a number of disc-like sectionsare arranged in axial alinement and clamped together, the entireassembly producing a cylindrical brush adapted to be rotated by amachine, for many types of cleaning, polishing and the like.

An object of the invention is to provide an improved circular brush.

Another object is to provide an improved brush in which the filamentswill be uniformly distributed.

Another object is to provide an improved brush II which may be easilyand economically manufactured.

Another object is to provide an improved brush which may be used witheither vegetable fiber or metal filaments.

Other objects will hereinafter appear.

The invention will be better understood from the description of onepractical embodiment thereof illustrated in the accompanying drawing, inwhich;

Figure 1 is a transverse section of the component parts of the improvedbrush, the parts being separated, but arranged to show their mutualrelationship;

Figure 2 is a view similar to Figure 1 with the parts placed closetogether, as will be done at the initial stage of their assembly;

Figure 3 is a similar view of the finished brush; and

Figure is a fragmentary View of the blank from which the retaining ringis produced.

The brush or section consists of an annularly arranged series of loopedfilaments with the loops disposed toward the center, through the loopsof which passes a ring or wire 2. A clamping ring is formed of a blank,conveniently of sheet metal, such as illustrated in Figure 4, having acentral fiat ring-shaped portion 3, on both sides of which are formedalternately disposed rectangular lugs 4, and longer lugs 5 provided attheir ends with prongs 6. The lugs 5 are bent outwardly oblique to thering portion 3 with the prongs turned upwardly and inwardly, as mostclearly seen in Figures 1 and 2.

The frusto-conical side or clamping rings 7 and 8 are placed at thesides of this retaining ring with their smaller ends toward each other.The openings through these ends are large enough to pass over the lugs4, as shown in Figure 2. With the parts in this position, the filaments1 and wire ring 2 are inserted, and the assembly suball 1930, Serial No.488,584

jected to pressure in suitable dies by which the rings 7 and 8 areflattened, as shown in Figure 3, and the lugs 4 are clinched over theirlower edges to firmly clamp them in this position.

This operation, of course, presses the lugs 5 together, causing theprongs to penetrate the mass of filaments beyond the wire ring 2, and,if long enough to contact the opposing rings, to be clinched over attheir ends, so that the prongs not only assist in locking the filamentsagainst radial or circumferential displacement but firmly clamp the wirering into the bottom of the space between the rings '7 and 8. Theclinching of the ends of the prongs is not essential to the properretention of the filaments and wire ring, but does not impair the firmretention of these elements. It is therefore possible to use a singlelength of prong for brushes of different thicknesses, the prongs bendingover in the case of the narrower brushes but lying straight in the caseof the wider sections. This permits sections to be produced of muchgreater thickness than has been possible heretofore, fills of an inch ormore in thickness being firmly retained.

By the invention above described a brush or section is produced which isbetter balanced than prior sections, is easier and'more economical tomanufacture, retains the filaments better, and in which, due to thickerfills, requires less sections for a given length of assembled brush.

While I have described the illustrated embodiment of my invention insome particularity, this is done by way of illustration only, it beingobvious that many other embodiments will readily occur to those skilledin this art, and I do not, therefore, limit myself to the precisedetails shown and described, but claim as my inventions all embodiments,variations and modifications coming within the scope of the subjoinedclaims.

I claim:

1. A circular brush comprising an annularly arranged series of loopedfilaments with the loops thereof centrally disposed, a ring passingthrough the loops of said filaments, a retaining member having prongsextending into the mass of filaments and overlying said ring, two fiatclamping rings embracing the looped portion of said filaments andretaining member, and clamping means carried by said retaining memberpressing said rings toward each other.

2. A circular brush comprising an annularly arranged series of loopedfilaments with the loops thereof centrally disposed, a ring passingthrough the loops of said filaments, a retaining member having prongsextending into the mass of fila- 1 which extend into said mass offilaments oversaid ring, and a second series of lugs'extending throughthe central openings ofa pair of flat clamping rings embracing the sidesof the pronged lugs and filaments, said second series of lugs beingclinched over the margins .01 said clamping rings.

4. The method of making a circular brush which comprises forming aretaining member comprising a cylindrical ring having two outwardlydiverging series of lugs, each of said lugs terminating in an inwardlydirected prong, the retaining member also having two oppositely disposedaxially extending series of lugs, placing two dished rings over saidsecond mentioned series of lugs, inserting looped portions of tufts offilaments within the space defined by the rings and retaining member,winding a wire about the retaining member through the looped portions ofsaid filaments, and then flattening said dished rings and simultaneouslypressing said prongs irito the mass or filaments over said wire, andclinching said second mentioned lugs over the exterior of the flattenedrings.

CLINTON E. FROST.

